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perf/aggregate: add --sort-by=regression option 

One of the most interesting thing one can be interested in when
looking at performance test results is possible performance
regressions.

This new option makes it easy to spot such possible regressions.

This new option is named '--sort-by=regression' to make it
possible and easy to add other ways to sort the results, like for
example '--sort-by=utime'.

If we would like to sort according to how much the stime regressed
we could also add a new option called '--sort-by=regression:stime'.
Then '--sort-by=regression' could become a synonym for
'--sort-by=regression:rtime'.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Christian Couder 2018-03-26 09:24:31 +02:00 committed by Junio C Hamano
parent c94b6ac50f
commit 2e3efd0613
1 changed files with 58 additions and 1 deletions
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59
t/perf/aggregate.perl
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@ -37,7 +37,7 @@ sub format_times {
}

my (@dirs, %dirnames, %dirabbrevs, %prefixes, @tests,
$codespeed, $subsection, $reponame);
$codespeed, $sortby, $subsection, $reponame);
while (scalar @ARGV) {
my $arg = $ARGV[0];
my $dir;
@ -46,6 +46,18 @@ while (scalar @ARGV) {
shift @ARGV;
next;
}
if ($arg =~ /--sort-by(?:=(.*))?/) {
shift @ARGV;
if (defined $1) {
$sortby = $1;
} else {
$sortby = shift @ARGV;
if (! defined $sortby) {
die "'--sort-by' requires an argument";
}
}
next;
}
if ($arg eq "--subsection") {
shift @ARGV;
$subsection = $ARGV[0];
@ -209,6 +221,49 @@ sub print_default_results {
}
}

sub print_sorted_results {
my ($sortby) = @_;

if ($sortby ne "regression") {
die "only 'regression' is supported as '--sort-by' argument";
}

my @evolutions;
for my $t (@subtests) {
my ($prevr, $prevu, $prevs, $prevrev);
for my $i (0..$#dirs) {
my $d = $dirs[$i];
my ($r, $u, $s) = get_times("$resultsdir/$prefixes{$d}$t.times");
if ($i > 0 and defined $r and defined $prevr and $prevr > 0) {
my $percent = 100.0 * ($r - $prevr) / $prevr;
push @evolutions, { "percent" => $percent,
"test" => $t,
"prevrev" => $prevrev,
"rev" => $d,
"prevr" => $prevr,
"r" => $r,
"prevu" => $prevu,
"u" => $u,
"prevs" => $prevs,
"s" => $s};
}
($prevr, $prevu, $prevs, $prevrev) = ($r, $u, $s, $d);
}
}

my @sorted_evolutions = sort { $b->{percent} <=> $a->{percent} } @evolutions;

for my $e (@sorted_evolutions) {
printf "%+.1f%%", $e->{percent};
print " " . $e->{test};
print " " . format_times($e->{prevr}, $e->{prevu}, $e->{prevs});
print " " . format_times($e->{r}, $e->{u}, $e->{s});
print " " . display_dir($e->{prevrev});
print " " . display_dir($e->{rev});
print "\n";
}
}

sub print_codespeed_results {
my ($subsection) = @_;

@ -263,6 +318,8 @@ binmode STDOUT, ":utf8" or die "PANIC on binmode: $!";

if ($codespeed) {
print_codespeed_results($subsection);
} elsif (defined $sortby) {
print_sorted_results($sortby);
} else {
print_default_results();
}